Free products and Pay what you want feature
To offer your product for free, you need to adjust the price to $0.00 at the bottom of your product editor page:
Note: this will automatically enable the "Pay what you want" feature and buyers will be able to choose if they want to pay for the product and how much they want to pay for it.
Pay what you want
If you want to charge something for your product, but are comfortable with letting buyers decide, you can use the "Pay what you want" feature:
Note: The minimum price you can set for a product is $0.90. This is done to cover the fees associated with the transaction.
Check out this article to get inspired to use the promising "Pay what you want" feature!